# 2087

This number is a prime.

It is curious that the reverse of 2087^9 is prime: 2087^9 =
751107401498753081320863207527: its reverse =
725702368023180357894104701157 is prime.

20^2087 - repeat(2087, 423 times) is prime: this 2716-digit prime
ends with repeat(9, 395 times), followed by 791, followed
by repeat(2791, 422 times), and ends with 3: also note that
2791 is prime; 30^2087 - repeat(2087, 461 times) is prime:
this 3083 digit prime ends with repeat(9, 243 times),
followed by 791, followed by repeat(2791, 460 times), and
ends with 3: also note that 2791 is prime; 24^2087 +
repeat(2087, 509 times) is prime: this is a 2881-digit prime:
also note that 509 is prime.

32^2087 - 208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087208720872087
= 2^10435 - repeat(2087, 87 times) is a 3142-digit prime. [Noll]